Good question. Did you ask the Bubble Tea stores?

I obviously didn't. First of all they are probably buying wholesale from Taïwan, secondly it'd be like : please can you give your sources, I want to copy what you're doing but for a cheaper price :)

Obviously. But I'd still start there, instead of making all those assumptions. Worst case they'll tell you that they can't help. 

Hi,

You can buy tapioca pearls in any Migros.

Kind regards

Marina

Thanks Marina,

I've seen the small tapioca pearls for pudding but haven't seen the bigger pearls used for tapioca. 

I'll go there tomorrow and ask.

Thx